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bug#25265: make-thread crashes in OS X 10.6


From: Alan Third
Subject: bug#25265: make-thread crashes in OS X 10.6
Date: Fri, 16 Jun 2017 21:51:39 +0100
User-agent: Mutt/1.7.2 (2016-11-26)

On Fri, Jun 16, 2017 at 04:05:58PM -0400, Noam Postavsky wrote:
> On Fri, Jun 16, 2017 at 3:45 PM, Alan Third <address@hidden> wrote:
> > The first one looks like the thread’s starting too quick?
> 
> I think it's rather failing to be killed by the `thread-signal' call.

Ah, yes. I completely misread the test.

> > The second looks like the thread’s not dying quick enough?
> 
> Same for that one. I don't know much about the thread internals, and
> even less macOS internals though...

Well, I’ve discovered that if I keep the mouse moving over the Emacs
frame while the tests are running then none of them fail, so I think
it’s something to do with ns_select jamming everything up for the
duration of its timeout.

I could probably get round that by getting the thread to fire off an
NS app defined event when it dies. That would break ns_select out of
its event loop, presumably letting the dying thread actually die...

Amazingly that seems to have worked! Updated patch attached.
-- 
Alan Third

Attachment: 0001-Fix-threads-on-NS-bug-25265.patch
Description: Text document


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